that will cool us down just in time for the weekend. it looks a whole lot better just in time for the weekend. >> okay. so tomorrow worse than tomorrow. wednesday we begin to improve. >> turn the corner on wednesday. >> tomorrow is a stay-inside kind of day. >> okay. we'll heed your advice. thank you, chuck. >>> delta air lines is investigating how needles somehow turned up in turkey sandwiches in four flights from amsterdam to the u.s. they were found in a total of six sandwiches. one passenger was injured but declined medical attention. the sandwiches are prepared in a catering kitchen in amsterdam. >>> tonight metro is trying to assure riders that it's safe and reliable. this after the computer system shut the system down twice over the weekend. on top of, that broken down trains also forced metro to close the dupont circle station several time this morning. "news 4's" darcy spencer has our story. >> reporter: metro officials still don't know the source of the computer glitch that force add temporary shutdown of the entire rail syste